20212012123 has 8 divisors (see below), whose sum is σ = 20527315200. Its totient is φ = 19898891520.

The previous prime is 20212012103. The next prime is 20212012157. The reversal of 20212012123 is 32121021202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20212012123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212012097 and 20212012106.

It is not an unprimeable number, because it can be changed into a prime (20212012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526948 + ... + 564001.

It is an arithmetic number, because the mean of its divisors is an integer number (2565914400).

Almost surely, 2^20212012123 is an apocalyptic number.

20212012123 is a deficient number, since it is larger than the sum of its proper divisors (315303077).

20212012123 is a wasteful number, since it uses less digits than its factorization.

20212012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091237.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20212012123 its reverse (32121021202), we get a palindrome (52333033325).

The spelling of 20212012123 in words is "twenty billion, two hundred twelve million, twelve thousand, one hundred twenty-three".